25533257 has 2 divisors, whose sum is σ = 25533258. Its totient is φ = 25533256.

The previous prime is 25533251. The next prime is 25533259. The reversal of 25533257 is 75233552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25240576 + 292681 = 5024^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 25533257 - 2⁴ = 25533241 is a prime.

Together with 25533259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25533251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12766628 + 12766629.

It is an arithmetic number, because the mean of its divisors is an integer number (12766629).

Almost surely, 2^25533257 is an apocalyptic number.

It is an amenable number.

25533257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25533257 is an equidigital number, since it uses as much as digits as its factorization.

25533257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31500, while the sum is 32.

The square root of 25533257 is about 5053.0443299065. The cubic root of 25533257 is about 294.4661685276.

The spelling of 25533257 in words is "twenty-five million, five hundred thirty-three thousand, two hundred fifty-seven".